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Patented N0v.3,1891.

-lq on' ELEGTRIG ELEVATOR.

H. H. BLADESav W. J. MGKEE.

(NoModel.)

nire STATES PATENT OFFICE.

HARRY ll. .BLADES AND WILLIAM J. llICKEE, 0F DETROIT, MUHlGN. I

ELECTRIC: ELEVATon.

SPECIFICATION' forming part of Letters Patent No. 482,527,- dted November 3, 189,1.

Application lied January l1, 1890. Seid No. 338.606. (No medal.)

To MN, whom t may concern,.-

lie it known that we, HARRY'H. BLADES and WILLIAM J. MCKEE, citizens of the UnitedV A States, residing at Detroit, county of Wayne,

State of Michiganiaveinvented a certain new and useful Improvement in Electric Elevators; and we declare the following to be a full, clear, and exact description of the same,snch

as will en able others skilled in the art to which it pertains to make andnse the same,refer ence bei n ghad'to the accompanying drawings, which form a' part of this specification.

ln the drawings, Figure 1 is a vertical longitudinal section, showing parts in elevation, of an elevator embodying our invention. Fig; 21's a diagrammatic view of switch,circuit wires, and running cord, the circuit-wi res heing shown as connected with the motor in Fig. l.

lt is the purpose of 'our invention to coinbine with an elevator,and more particularly a freight-elevator, an electric motor, the Said motor connected with the lelevator-cab and adapted to travel with it, and switch mechanism on the car for governing the admission of current to the motor; also, in connection therewith a continuons cable travelling with the car, whereby an y person at any floor may operate the said electric switch and canse the elevator to ascend or descend to his level, as the case may be;`also,in peculiar features of construction in connection Vwith the said npparatns.

In carrying out our invention,A represents an elevetor cob or platform.

represents fixed rack-hars in the guides or wave along `which the elevator travels.

`G is an electric motor suitably supported by brackets C or otherwise to the car and preferably beneath the car, although it may be located either above or below the car, as may be desired. The shaft D of this electric' motor is provided with worms D2, which in 'torn mesh with worm-gears D3.

On the shaft of the gear D is an ordinaryl gearingwheelD-Swhich mesh es with a suitable Q inion Diand this in turn engages the rack l The said pinion ismade of a suitable size togear down the speed of the motor to correnpond with the desired speed of the eleyator.

` l. L renresent thewires connecting the field of the motor with the trolleys J J.;

M hrepresent the terminals of 'the eldl" 'lhe'conrse of the currentl is from the' trolley J through L to M, through thefield to M',and through L' to the trolley J'.

E is a switch located preferably within the elevator, so as to be operated by a person on the elevator. This switch governs the introduction of current to the armature of the motor.

F represents a 'running cord or continuous cable extending from the top tothe bottom 4of thc -weil, and which is connected with the switch in such manner that the switch may he operated from any floor, so that a person upon any floor-may cause the elevator to ascend or descend to his positionthat is to say, the switch (which needs no particular dcscription since'it forms no part of our presont invention) of that character which, by v a motion in one direction, will introduce the current into the armature of the machine in a direction to cause the elevator to descend, while a motion in the opposite dfincction will introduce the current in a direction to cause the elevator' to ascend, while with the switch at another fixed position thc elevator will stand still. Such arrangement of switch is illustrated in diagrammatic forni in Fig. 2. In this diagram i represents the runninslr cord; l K', the armature --circnit; G, the switch-arms,a nd Ga projecting switch-lever which fixedlycngnges the said cord lo. g and g2 represent a set of terminals so connected with the motor-circuit that when the switchlevers are upon them the current will pass along the conductor l through the armature vater to ascend; but by lifting on theV cord F the-switch-levers may be caused to rest upon vthe terminals g and y', in which event the current is directe'd throngh'the armature of `ol the motor in a direction to cause the elethe motor in the reverse direction or in a dircction to canse the elevator to descend, and l by throwingfthe said switch into such a posiv l tion as to connect with another set of termiunisgB the current would be cut olii or so ma n'ipnlated as to hold the elevator at rest.

The current maybe broughtto the elevator ZOO in yany nsualWay-aS, for instance, by oonnesting the Same with two rods, one :it each side of the elevator-well, and raking the eurrent off from the said 'lods by trolleys. Such rods are shown at H H and the trolleys nro indiea'tedt J J. This arrangement of the :notoiupon .the ear reduces to the minimum the costl of construction. The worm gen1 mechanism also imparts n very eertnin and positive motion to the cer. Again, should the motor get out of order or the current be ont oft', the engagementof the pinion-s with *ne metz-bar md with the worin-gears is snol; t the worm-gears serve to eeei'nnlly look naz-' prevent the ear from descending.

Instead of the worin-gearbeing loomed upon the armature-Shaftyit may be formed on :t shaft directly connected to and in line with the armature'ehaft.

vWhitt we claim is- 'ihe combination, with an elevator, of an eleetrie motor located thereon, niek-bars at the Sides of the weil, gearing engaging the said melf-bars with the armature-shaft, and switch loca-tod on the elevator for governing the admission of current to the motor, and o.

'running rope extending from the top to the HARRY ll. BLADES.

-WlLLlAM J. Molilli).

W'itnesses:

WELLS Xl'. linomc'vr,

3l. A. 'l-REVE. 

